// 日期格式化
function dateFormat(date, format) {
  var o = {
    "M+": date.getMonth() + 1, //month 
    "d+": date.getDate(), //day 
    "h+": date.getHours(), //hour 
    "m+": date.getMinutes(), //minute 
    "s+": date.getSeconds(), //second 
    "q+": Math.floor((date.getMonth() + 3) / 3), //quarter 
    "S": date.getMilliseconds() //millisecond 
  }
  if (/(y+)/.test(format)) format = format.replace(RegExp.$1,
    (date.getFullYear() + "").substr(4 - RegExp.$1.length));
  for (var k in o) if (new RegExp("(" + k + ")").test(format))
    format = format.replace(RegExp.$1,
      RegExp.$1.length == 1 ? o[k] :
        ("00" + o[k]).substr(("" + o[k]).length));
  return format;
}

